相关实验视频
Updated: Feb 10, 2026

09:12
DNAzyme-dependent Analysis of rRNA 2’-O-Methylation
Published on: September 16, 2019
8.8K
在类的rRNA档案中隐藏的突破多样性
Aitana Casanova Gómez1, Francesc Mesquita-Joanes1, Ferran Palero1
1Cavanilles Institute of Biodiversity and Evolutionary Biology, Universidad de Valencia, Paterna, Spain.
PeerJ
|February 9, 2026
概括
在28S核糖体RNA (rRNA) 中的隐藏断裂显示了Oligostraca和Branchiopoda的新多样性,Malacostraca显示了与D7a附近扩张相关的多样性. 这凸显了关节动物样本分析中需要对rRNA有意识的质量控制的需要.
科学领域:
- 分子生物学分子生物学
- 基因组学就是基因组学.
- 无脊椎动物动物学
背景情况:
- 许多无脊椎动物在其28S核糖体RNA (rRNA) 分子中存在隐藏的断裂,将其分割成28S核糖体RNA亚单元α (28Sa) 和28S核糖体RNA亚单元β (28Sb) 片段.
- 这种现象掩盖了电泳特征中的全部28S核糖体RNA (rRNA),可能会偏向提取的组织样本中的标准RNA质量测量.
- 在类动物中,特别是Oligostraca中,RNA隐藏突破的多样性仍然在很大程度上未被描述.
研究的目的:
- 为了研究28S核糖体RNA (rRNA) 的多样性,在Oligostraca中隐藏了断裂,并将其与Branchiopoda和Malacostraca进行比较.
- 通过使用高分辨率毛细体电泳来精细估计28S核糖体RNA (rRNA) 子单元的碎片大小.
- 为了将观察到的RNA形状异质性与28S核糖体RNA (rRNA) 的特定二次结构域相关联,特别是D3和D7a.
主要方法:
- 从西班牙瓦伦西亚附近的Branchiopoda,Malacostraca和Oligostraca中采集了12种无脊椎动物的样本.
- 使用DNA/RNA Shield进行RNA稳定,通过Quick-RNA MagBead进行提取,然后在Agilent 5200碎片分析仪上进行分析.
- 使用BLAST推断的基因长度分配RNA峰值,并分析28S二次结构域 (D区域) 与RNAfold.
主要成果:
- 寡头类动物和大多数枝类动物表现出与18S,28Sa和28Sb类似大小的碎片的正规形状.
- 马拉科斯特拉卡斯表现出多个峰值的多样化配置,表明扩张改变了28Sa和28Sb的相对大小,特别是在D7a域附近.
- 对比分析显示了Oligostraca/Branchiopoda中保存的D3/D7a结构,与Malacostraca中更高的变异性和频繁的扩张形成鲜明对比.
结论:
- 这项研究扩展了已知的RNA配置文件多样性,包括Oligostraca,提供了精细的碎片大小估计.
- 马拉科斯特拉干RNA的特异性与扩张有关,特别是在D7a域周围.
- 建议包括实施关节动物样本的rRNA意识质量控制,并进一步测序研究不足的血统,以阐明隐藏的断裂机制和家族遗传分布.
相关概念视频
Fixing Double-strand Breaks
14.8K
The double-stranded structure of DNA has two major advantages. First, it serves as a safe repository of genetic information where one strand serves as the back-up in case the other strand is damaged. Second, the double-helical structure can be wrapped around proteins called histones to form nucleosomes, which can then be tightly wound to form chromosomes. This way, DNA chains up to 2 inches long can be contained within microscopic structures in a cell. A double-stranded break not only damages...
14.8K
Fixing Double-strand Breaks
4.5K
4.5K
Cell Diversity
5.1K
The concept of a cell started with microscopic observations of dead cork tissue by Robert Hooke in 1665. Hooke coined the term "cell" based on the resemblance of the small subdivisions in the cork to the rooms that monks inhabited, called cells. About ten years later, Antonie van Leeuwenhoek became the first person to observe the living and moving cells under a microscope. In the century that followed, the theory that cells represented the basic unit of life developed.
Multicellular...
Multicellular...
5.1K
Diversity of Archaea II
532
Archaea, one of the three domains of life, exhibit remarkable diversity and adaptability, thriving in both extreme and moderate environments. Historically, most identified archaea have been classified into two major phyla: Euryarchaeota and Crenarchaeota. However, recent molecular studies have expanded this classification to include three additional phyla: Thaumarchaeota, Nanoarchaeota, and Korarchaeota, each exhibiting unique characteristics and ecological roles.Thaumarchaeota: Mesophiles...
532
Diversity of Protists I
1.2K
Excavata is a diverse group of protists that includes both chemoorganotrophic and phototrophic species, with some thriving in anaerobic environments. Among the key groups within Excavata are diplomonads and parabasalids, which are flagellated protists that lack mitochondria and chloroplasts. These microorganisms typically inhabit anoxic environments, such as the intestines of animals, where they exist either symbiotically or as parasites, relying on fermentation for energy production. Some...
1.2K
Diversity of Protists II
1.2K
Alveolates are a group of organisms recognized by the presence of alveoli, which are cytoplasmic sacs located beneath the cell membrane. While their function remains uncertain, alveoli may help regulate water balance by controlling how much water enters and leaves the cell. In dinoflagellates, these structures may serve as armor plates. There are three major types of alveolates: ciliates, which move using cilia; dinoflagellates, which use flagella for movement; and apicomplexans, which are...
1.2K

